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孙德勇,李云梅,王桥,乐成峰,黄昌春,伍蓝.太湖水体散射特性及其空间分异.湖泊科学,2008,20(3):389-395. DOI:10.18307/2008.0320
SUN De-yong,LI Yun-mei,WANG Qiao,LE Cheng-feng,HUANG Chang-chun,WU Lan.The scattering characteristics of Lake Taihu waters. J. Lake Sci.2008,20(3):389-395. DOI:10.18307/2008.0320
太湖水体散射特性及其空间分异
The scattering characteristics of Lake Taihu waters
投稿时间:2007-09-29  修订日期:2007-11-07
DOI:10.18307/2008.0320
中文关键词: 后向散射系数  散射系数  空间分异  太湖
Keywords: Backscattering coefficient  scattering coefficient  spatial difference  Lake Taihu
基金项目:国家自然科学基金项目(40571110)资助
作者单位
孙德勇 南京师范大学教育部虚拟地理环境重点实验室, 南京 210046 
李云梅 南京师范大学教育部虚拟地理环境重点实验室, 南京 210046 
王桥 南京师范大学教育部虚拟地理环境重点实验室, 南京 210046 
乐成峰 南京师范大学教育部虚拟地理环境重点实验室, 南京 210046 
黄昌春 南京师范大学教育部虚拟地理环境重点实验室, 南京 210046 
伍蓝 南京师范大学教育部虚拟地理环境重点实验室, 南京 210046 
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中文摘要:
      利用Wetlabs公司研制的AC-S和BB9于2006年10月24日至11月2日对太湖水体的散射系数和后向散射系数进行了测量,在此基础上建立了太湖水体散射系数与后向散射系数之间的关系模型.用2种曲线函数模拟,即在蓝光波段使用S形曲线模型,在绿光和红光波段使用逆函数模型,各模型的MAPE和RMSE变化范围分别为0.027-0.156m-1、0.005-0.050m-1,模型整体预测精度都较高.研究发现后向散射系数与散射系数的空间分异现象明显,北部梅梁湾、湖心区、西部及西南部水域散射较强,而东太湖、胥口湾等东部水域的散射相对较弱.
Abstract:
      Based on water inherent optical properties using AC-S and BB9, which were developed by WETlabs Inc, the backscattering and scattering coefficients of Lake Taihu waters had been obtained from Oct. 24th to Nov. 2rd, 2006. Based on data analysis, the models between backscattering coefficients and scattering coefficients had been established. Two kinds of curve functions had been used to simulate, i.e. S curve at blue waveband and inverse function at green and red wavebands. And the change ranges of MAPE and RMSE are 0.027-0.156 m-1 and 0.005-0.050m-1, which indicated higher accuracy. Meanwhile, marked spatial distribution differences of the backscattering and scattering coefficients were found in Lake Taihu. As far as the entire lake was concerned, the scattering and backscattering coefficients in wester lake regions were higher than those in eastern lake regions. Strong scattering and backscattering were found in Meiliang Bay, center region of lake, western and southwestern lake region, while weak values were in East Lake Taihu and Xukou Bay.
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